Owners of second-gen MacBook Airs have gained much-requested Trim support for the SSDs in their skinny computers thanks to Apple's latest OS X update.
The Trim command can be issued to compatible solid-state drives to tell them which data are no longer considered in use and so can be erased by the drive itself.
This essentially …

wrong link

Does it actually work?

I tried the TRIM patch about a month or two ago on Crucial SSD-ed Macbook. After reading some of the comments on the site mentioned, about performance problems and even stability issues, I decided to uninstall it and wait for Lion.

The question is: just because it may say that it "works" - all we see is a TRIM enabled = yes.

Also, unless you start with a freshly reformatted SSD, what happens to blocks that had held deleted files in the "pre-TRIM" state? I suppose a SSD with GC will eventually get around to them?

PS: I love some of the comments on www.groths.org like this one "My PLEXTOR PX-128M2S thanks you, and I thank you. I enjoy a screaming fast laptop." Wow! Your laptop got faster just by installing that patch? /facepalm

Title

Yet another reason

...to not "upgrade" to Lion.

Still waiting to see a "must have" feature in Lion (and no, stuff lifted from iOS and wedged in doesn't count for me). At this rate - with icloud in particular (at the moment) - I'm actually going to lose features (mobileme sync)!

TRIM

RE: Did any testing body prove the need?

I think you'll find that TRIM is something that the drive manufacturers like to support, and is OS agnostic, and that even the Mac needs to do it to maintain high read/write throughput, assuming that is the reason you went for SSD rather than the usual "it's shiny" argument... and assuming Stevie J gave you the choice in the first place!

You're probably thinking of the whole defragmentation argument that Apple's HFS claimed to not need (it actually did it during file processing and in the background).